$ sigrok-cli --loglevel 5 -d sysclk-lwla --samples 4g
sr: [00:00.000001] log: libsigrok loglevel set to 5.
sr: [00:00.000016] backend: libsigrok 0.4.0-git-89c8226/3:0:0 (rt: 0.4.0-git-89c8226/3:0:0).
sr: [00:00.000034] backend: Libs: glib 2.46.2 (rt: 2.46.2/4602:2), libzip 1.0.1, libserialport 0.1.1/1:0:1 (rt: 0.1.1/1:0:1), libusb-1.0 1.0.20.11004, libftdi 1.2.
sr: [00:00.000040] backend: Host: x86_64-unknown-linux-gnu, little-endian.
sr: [00:00.000044] backend: SCPI backends: TCP, RPC, serial, USBTMC.
sr: [00:00.000056] backend: Sanity-checking all drivers.
sr: [00:00.000061] backend: Sanity-checking all input modules.
sr: [00:00.000068] backend: Sanity-checking all output modules.
sr: [00:00.000071] backend: Sanity-checking all transform modules.
srd: libsigrokdecode loglevel set to 5.
sr: [00:00.003978] hwdriver: Initializing driver 'sysclk-lwla'.
sr: [00:00.004000] hwdriver: Scan of 'sysclk-lwla' found 1 devices.
sr: [00:00.004018] usb: Trying to open USB device 3.14.
sr: [00:00.004036] usb: Opened USB device (VID:PID = 2961:6689, bus.address = 3.14).
sr: [00:00.044279] resource: Attempt to open '/home/steven/.local/share/sigrok-firmware/sysclk-lwla1034-int.rbf' failed: No such file or directory
sr: [00:00.044298] resource: Opened '/usr/share/sigrok-firmware/sysclk-lwla1034-int.rbf'.
sr: [00:00.044351] sysclk-lwla: Downloading FPGA bitstream 'sysclk-lwla1034-int.rbf'.
sr: [00:00.938170] sysclk-lwla: FPGA bitstream download of 81464 bytes done.
sr: [00:01.968560] sysclk-lwla: Failed to receive reply: LIBUSB_ERROR_TIMEOUT.
sr: [00:02.968775] sysclk-lwla: Failed to receive reply: LIBUSB_ERROR_TIMEOUT.
sr: [00:02.968814] usb: Closed USB device 3.14.
sr: [00:02.968820] usb: Trying to open USB device 3.14.
sr: [00:02.968855] usb: Opened USB device (VID:PID = 2961:6689, bus.address = 3.14).
sr: [00:03.009218] resource: Attempt to open '/home/steven/.local/share/sigrok-firmware/sysclk-lwla1034-int.rbf' failed: No such file or directory
sr: [00:03.009243] resource: Opened '/usr/share/sigrok-firmware/sysclk-lwla1034-int.rbf'.
sr: [00:03.009288] sysclk-lwla: Downloading FPGA bitstream 'sysclk-lwla1034-int.rbf'.
sr: [00:03.903092] sysclk-lwla: FPGA bitstream download of 81464 bytes done.
sr: [00:03.934002] hwdriver: sr_config_set(): key 50001 (limit_samples) sdi 0x1b3bdc0 cg NULL -> uint64 4000000000
sr: [00:03.934032] session: Using thread-default main context.
sr: [00:03.934035] session: Starting.
sr: [00:03.934041] sysclk-lwla: Starting acquisition.
sr: [00:03.934065] sysclk-lwla: Acquisition sample count limit 4000000000.
sr: [00:03.934069] sysclk-lwla: Internal clock, samplerate 125000000.
sr: [00:03.934388] std: sysclk-lwla: Starting acquisition.
sr: [00:03.934393] std: sysclk-lwla: Sending SR_DF_HEADER packet.
sr: [00:03.934398] session: Running transform module 'nop'.
sr: [00:03.934404] transform/nop: Received packet of type 10000, passing on unmodified.
sr: [00:03.934409] session: bus: Received SR_DF_HEADER packet.
cli: Received SR_DF_HEADER.
sr: [00:03.934451] hwdriver: sr_config_get(): key 30000 (samplerate) sdi 0x1b3bdc0 cg NULL -> uint64 125000000
sr: [00:03.934575] sysclk-lwla: Acquisition started.
sr: [00:04.034863] sysclk-lwla: Captured 11 words, 100 ms, status 0x64.
sr: [00:04.034875] sysclk-lwla: Capture triggered.
sr: [00:04.034877] sysclk-lwla: Sampling in progress.
sr: [00:04.135163] sysclk-lwla: Captured 11 words, 200 ms, status 0x64.
sr: [00:04.135179] sysclk-lwla: Sampling in progress.
sr: [00:04.235471] sysclk-lwla: Captured 11 words, 300 ms, status 0x64.
sr: [00:04.235486] sysclk-lwla: Sampling in progress.
sr: [00:04.335802] sysclk-lwla: Captured 11 words, 400 ms, status 0x64.
sr: [00:04.335814] sysclk-lwla: Sampling in progress.
sr: [00:04.436124] sysclk-lwla: Captured 11 words, 500 ms, status 0x64.
sr: [00:04.436137] sysclk-lwla: Sampling in progress.
sr: [00:04.536421] sysclk-lwla: Captured 11 words, 601 ms, status 0x64.
sr: [00:04.536434] sysclk-lwla: Sampling in progress.
sr: [00:04.636744] sysclk-lwla: Captured 11 words, 701 ms, status 0x64.
sr: [00:04.636757] sysclk-lwla: Sampling in progress.
sr: [00:04.736991] sysclk-lwla: Captured 11 words, 801 ms, status 0x64.
sr: [00:04.737006] sysclk-lwla: Sampling in progress.
sr: [00:04.837284] sysclk-lwla: Captured 11 words, 902 ms, status 0x64.
sr: [00:04.837297] sysclk-lwla: Sampling in progress.
sr: [00:04.937583] sysclk-lwla: Captured 11 words, 1002 ms, status 0x64.
sr: [00:04.937596] sysclk-lwla: Sampling in progress.
sr: [00:05.037882] sysclk-lwla: Captured 11 words, 1103 ms, status 0x64.
sr: [00:05.037895] sysclk-lwla: Sampling in progress.
sr: [00:05.138249] sysclk-lwla: Captured 11 words, 1203 ms, status 0x64.
sr: [00:05.138264] sysclk-lwla: Sampling in progress.
sr: [00:05.238490] sysclk-lwla: Captured 11 words, 1303 ms, status 0x64.
sr: [00:05.238502] sysclk-lwla: Sampling in progress.
sr: [00:05.338802] sysclk-lwla: Captured 11 words, 1404 ms, status 0x64.
sr: [00:05.338816] sysclk-lwla: Sampling in progress.
sr: [00:05.439126] sysclk-lwla: Captured 11 words, 1504 ms, status 0x64.
sr: [00:05.439140] sysclk-lwla: Sampling in progress.
sr: [00:05.539417] sysclk-lwla: Captured 11 words, 1604 ms, status 0x64.
sr: [00:05.539430] sysclk-lwla: Sampling in progress.
sr: [00:05.639748] sysclk-lwla: Captured 11 words, 1704 ms, status 0x64.
sr: [00:05.639761] sysclk-lwla: Sampling in progress.
sr: [00:05.739978] sysclk-lwla: Captured 11 words, 1804 ms, status 0x64.
sr: [00:05.739992] sysclk-lwla: Sampling in progress.
sr: [00:05.840321] sysclk-lwla: Captured 11 words, 1905 ms, status 0x64.
sr: [00:05.840334] sysclk-lwla: Sampling in progress.
sr: [00:05.940620] sysclk-lwla: Captured 11 words, 2005 ms, status 0x64.
sr: [00:05.940637] sysclk-lwla: Sampling in progress.
sr: [00:06.040982] sysclk-lwla: Captured 11 words, 2105 ms, status 0x64.
sr: [00:06.040995] sysclk-lwla: Sampling in progress.
sr: [00:06.141279] sysclk-lwla: Captured 11 words, 2206 ms, status 0x64.
sr: [00:06.141292] sysclk-lwla: Sampling in progress.
sr: [00:06.241570] sysclk-lwla: Captured 11 words, 2306 ms, status 0x64.
sr: [00:06.241584] sysclk-lwla: Sampling in progress.
sr: [00:06.341860] sysclk-lwla: Captured 11 words, 2406 ms, status 0x64.
sr: [00:06.341874] sysclk-lwla: Sampling in progress.
sr: [00:06.442120] sysclk-lwla: Captured 11 words, 2507 ms, status 0x64.
sr: [00:06.442134] sysclk-lwla: Sampling in progress.
sr: [00:06.542353] sysclk-lwla: Captured 11 words, 2607 ms, status 0x64.
sr: [00:06.542366] sysclk-lwla: Sampling in progress.
sr: [00:06.642692] sysclk-lwla: Captured 11 words, 2708 ms, status 0x64.
sr: [00:06.642706] sysclk-lwla: Sampling in progress.
sr: [00:06.742930] sysclk-lwla: Captured 11 words, 2808 ms, status 0x64.
sr: [00:06.742945] sysclk-lwla: Sampling in progress.
sr: [00:06.843279] sysclk-lwla: Captured 11 words, 2908 ms, status 0x64.
sr: [00:06.843294] sysclk-lwla: Sampling in progress.
sr: [00:06.943581] sysclk-lwla: Captured 11 words, 3008 ms, status 0x64.
sr: [00:06.943594] sysclk-lwla: Sampling in progress.
sr: [00:07.043868] sysclk-lwla: Captured 11 words, 3108 ms, status 0x64.
sr: [00:07.043884] sysclk-lwla: Sampling in progress.
sr: [00:07.144233] sysclk-lwla: Captured 11 words, 3208 ms, status 0x64.
sr: [00:07.144246] sysclk-lwla: Sampling in progress.
sr: [00:07.244532] sysclk-lwla: Captured 11 words, 3309 ms, status 0x64.
sr: [00:07.244549] sysclk-lwla: Sampling in progress.
sr: [00:07.344834] sysclk-lwla: Captured 11 words, 3409 ms, status 0x64.
sr: [00:07.344848] sysclk-lwla: Sampling in progress.
sr: [00:07.445134] sysclk-lwla: Captured 11 words, 3510 ms, status 0x64.
sr: [00:07.445148] sysclk-lwla: Sampling in progress.
sr: [00:07.545431] sysclk-lwla: Captured 11 words, 3610 ms, status 0x64.
sr: [00:07.545444] sysclk-lwla: Sampling in progress.
sr: [00:07.645776] sysclk-lwla: Captured 11 words, 3710 ms, status 0x64.
sr: [00:07.645789] sysclk-lwla: Sampling in progress.
sr: [00:07.746050] sysclk-lwla: Captured 11 words, 3811 ms, status 0x64.
sr: [00:07.746062] sysclk-lwla: Sampling in progress.
sr: [00:07.846354] sysclk-lwla: Captured 11 words, 3911 ms, status 0x64.
sr: [00:07.846367] sysclk-lwla: Sampling in progress.
sr: [00:07.946641] sysclk-lwla: Captured 11 words, 4011 ms, status 0x64.
sr: [00:07.946654] sysclk-lwla: Sampling in progress.
sr: [00:08.046941] sysclk-lwla: Captured 11 words, 4112 ms, status 0x64.
sr: [00:08.046954] sysclk-lwla: Sampling in progress.
sr: [00:09.147350] sysclk-lwla: Transfer from device failed (state 8): LIBUSB_TRANSFER_TIMED_OUT.
sr: [00:09.147371] sysclk-lwla: Acquisition stopped.
sr: [00:09.147379] session: Running transform module 'nop'.
sr: [00:09.147384] transform/nop: Received packet of type 10001, passing on unmodified.
sr: [00:09.147391] session: bus: Received SR_DF_END packet.
cli: Received SR_DF_END.
sr: [00:09.147416] usb: usb_source_finalize
sr: [00:09.147425] session: Stopped.
sr: [00:09.147463] resource: Attempt to open '/home/steven/.local/share/sigrok-firmware/sysclk-lwla1034-off.rbf' failed: No such file or directory
sr: [00:09.147474] resource: Opened '/usr/share/sigrok-firmware/sysclk-lwla1034-off.rbf'.
sr: [00:09.147514] sysclk-lwla: Downloading FPGA bitstream 'sysclk-lwla1034-off.rbf'.
sr: [00:09.656460] sysclk-lwla: FPGA bitstream download of 48525 bytes done.
sr: [00:09.686561] usb: Closed USB device 3.14.
sr: [00:09.686576] sysclk-lwla: Device context cleared.